1500887161 has 4 divisors (see below), whose sum is σ = 1500988324. Its totient is φ = 1500786000.

The previous prime is 1500887153. The next prime is 1500887173. The reversal of 1500887161 is 1617880051.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 1045875600 + 455011561 = 32340^2 + 21331^2 .

It is a cyclic number.

It is not a de Polignac number, because 1500887161 - 2³ = 1500887153 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1500887161.

It is not an unprimeable number, because it can be changed into a prime (1500887461) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23490 + ... + 59611.

It is an arithmetic number, because the mean of its divisors is an integer number (375247081).

Almost surely, 2^1500887161 is an apocalyptic number.

It is an amenable number.

1500887161 is a deficient number, since it is larger than the sum of its proper divisors (101163).

1500887161 is an equidigital number, since it uses as much as digits as its factorization.

1500887161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101162.

The product of its (nonzero) digits is 13440, while the sum is 37.

The square root of 1500887161 is about 38741.2849683642. The cubic root of 1500887161 is about 1144.9398749280.

The spelling of 1500887161 in words is "one billion, five hundred million, eight hundred eighty-seven thousand, one hundred sixty-one".